FT2232L Dual USB UART / FIFO I.C.
1.0 Introduction
The FT2232L is the lead free version of FTDI’s 3rd generation USB UART / FIFO I.C. family. This device features two
Multi-Purpose UART / FIFO controllers which can be configured individually in several different modes. As well as a
UART interface, FIFO interface and Bit-Bang IO modes of the 2nd generation FT232BM and FT245BM devices, the
FT2232L offers a variety of additional new modes of operation, including a Multi-Protocol Synchronous Serial Engine
interface which is designed specifically for synchronous serial protocols such as JTAG and SPI bus.
1.1 Features Summary
HARDWARE FEATURES
Reset input and Reset Output pins
5V and 3.3V logic IO Interfacing with independent
level conversion on each channel
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Single Chip USB Dual Channel Serial / Parallel
Ports with a variety of configurations
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Integrated 3.3V LDO Regulator for USB IO
Integrated 6MHz – 48Mhz clock multiplier PLL
USB Bulk or Isochronous data transfer modes
4.35V to 5.25V single supply operating voltage
range
Entire USB protocol handled on the chip...no USB-
specific firmware programming required
FT232BM-style UART interface option with full
Handshaking & Modem interface signals
UART Interface supports 7 / 8 bit data, 1 / 2 stop
bits, and Odd / Even / Mark / Space / No Parity
Transfer Data Rate 300 to 1 Mega Baud (RS232)
Transfer Data Rate 300 to 3 Mega Baud (TTL and
RS422 / RS485)
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UHCI / OHCI / EHCI host controller compatible
USB 2.0 Full Speed (12 Mbits / Second)
compatible
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Compact 48-LD Lead Free LQFP package
VIRTUAL COM PORT (VCP) DRIVERS for
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Auto Transmit Enable control for RS485 serial
applications using TXDEN pin
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Windows 98 / 98 SE / 2000 / ME / XP
Linux 2.40 and greater
Windows CE
FT245BM-style FIFO interface option with bi-
directional data bus and simple 4 wire handshake
interface
MAC OS-8 and OS-9**
MAC OS-X
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Transfer Data Rate up to 1 MegaByte / Second
Enhanced Bit-Bang Mode interface option
New Synchronous Bit-Bang Mode interface option
New Multi-Protocol Synchronous Serial Engine
(MPSSE) interface option
D2XX (USB Direct Drivers + DLL S/W Interface)
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Windows 98 / 98 SE / 2000 / ME / XP
Linux 2.4 and Greater
APPLICATION AREAS
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USB Dual Port RS232 Converters
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New MCU Host Bus Emulation Mode option
New Fast Opto-Isolated Serial Interface Mode
option
USB Dual Port RS422 / RS485 Converters
Upgrading Legacy Peripheral Designs to USB
USB Instrumentation
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Interface mode and USB Description strings
configurable in external EEPROM
USB JTAG Programming
USB to SPI Bus Interfaces
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EEPROM Configurable on board via USB
Support for USB Suspend and Resume conditions
via PWREN#, and SI / WU pins
USB Industrial Control
Field Upgradable USB Products
Galvanically Isolated Products with USB Interface
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Support for bus powered, self powered, and high-
power bus powered USB configurations
Integrated Power-On-Reset circuit, with optional
[ ** = In planning or under development ]
DS2232L Version 1.4
© Future Technology Devices International Ltd. 2005 Page 1 of 51